Don't build static bins with PIE, only for dynamic.

configure

@@ -203,9 +203,7 @@ check_compiler_flag()
 	local var="$3"
 	local rv=0
 
-	if [ -z "$var" ]; then
-		var="CFLAGS"
-	fi
+	[ -z "$var" ] && var="CFLAGS"
 
 	printf "Checking if $CC supports -${mode}${flag} ... "
 	cat <<EOF >_ccflag.c

prog.mk

@@ -1,7 +1,6 @@
 -include $(TOPDIR)/config.mk
 
 OBJS	?= main.o
-CFLAGS  += $(PROG_CFLAGS)
 
 .PHONY: all
 all: $(BIN) $(BIN).static
@@ -40,5 +39,6 @@ $(BIN).static: $(OBJS)
 
 $(BIN): $(OBJS)
 	@printf " [CCLD]\t\t$@\n"
-	${SILENT}$(CC) $^ $(CPPFLAGS) $(CFLAGS) $(LDFLAGS) $(PROG_LDFLAGS) -o $@
+	${SILENT}$(CC) $^ $(CPPFLAGS) $(CFLAGS) $(PROG_CFLAGS) \
+		$(LDFLAGS) $(PROG_LDFLAGS) -o $@